Chief U.S. District Judge Edward Nottingham is expected to resign from the bench in the midst of a probe into whether he asked a prostitute to mislead judicial prosecutors, according to 9News.

Nottingham, who has been on the bench for nearly 20 years, has been under scrutiny for a year, since an ex-wife first reported in court papers that he had spent hundreds of dollars at a strip club and that she saw him using his judicial computer to look at a dating or escort service.

9News also reported that Nottingham’s name arose in the January investigation of a prostitution ring.

In the latest allegation, the station says that a prostitute says Nottingham asked her in March to mask their weekly $250-to-$300 an hour sessions if she was questioned by judicial investigators.

Nottingham has declined to comment, and his attorney has not returned calls seeking comment.